<template>
  <div v-if="easyFlowVisible" style="height: calc(100vh)">
    <el-row>
      <!--顶部工具菜单-->
      <el-col :span="24">
        <div class="ef-tooltar">
          <el-divider direction="vertical"></el-divider>
          <el-button type="text" size="large" @click="startTaskHandler"
            >执行</el-button
          >
          <el-divider direction="vertical"></el-divider>
          <el-button type="text" size="large" @click="saveTask">保存</el-button>
          <el-divider direction="vertical"></el-divider>
          <el-button type="text" size="large" @click="deleteElement"
            >导出</el-button
          >
          <el-divider direction="vertical"></el-divider>
          <el-button
            type="text"
            icon="el-icon-delete"
            size="large"
            @click="deleteElement"
            :disabled="!this.activeElement.type"
          ></el-button>
          <el-divider direction="vertical"></el-divider>
          <el-button
            type="text"
            icon="el-icon-download"
            size="large"
            @click="downloadData"
          ></el-button>
          <el-divider direction="vertical"></el-divider>
          <el-button
            type="text"
            icon="el-icon-plus"
            size="large"
            @click="zoomAdd"
          ></el-button>
          <el-divider direction="vertical"></el-divider>
          <el-button
            type="text"
            icon="el-icon-minus"
            size="large"
            @click="zoomSub"
          ></el-button>
          <!-- <div style="float: right;margin-right: 5px">
                        <el-button type="info" plain round icon="el-icon-document" @click="dataInfo" size="mini">流程信息</el-button>
                        <el-button type="primary" plain round @click="dataReloadA" icon="el-icon-refresh" size="mini">切换流程A</el-button>
                        <el-button type="primary" plain round @click="dataReloadB" icon="el-icon-refresh" size="mini">切换流程B</el-button>
                        <el-button type="primary" plain round @click="dataReloadC" icon="el-icon-refresh" size="mini">切换流程C</el-button>
                        <el-button type="primary" plain round @click="dataReloadD" icon="el-icon-refresh" size="mini">自定义样式</el-button>
                        <el-button type="info" plain round icon="el-icon-document" @click="openHelp" size="mini">帮助</el-button>
                    </div> -->
        </div>
      </el-col>
    </el-row>
    <div style="display: flex; height: calc(100% - 47px)">
      <div style="width: 230px; border-right: 1px solid #dce3e8">
        <node-menu @addNode="addNode" ref="nodeMenu"></node-menu>
      </div>
      <div
        id="efContainer"
        ref="efContainer"
        class="container"
        v-flowDrag
        @dblclick="jobSettingHandler"
      >
        <template v-for="node in data.items">
          <flow-node
            :id="node.id"
            :key="node.id"
            :step="node"
            :activeElement="activeElement"
            @changeNodeSite="changeNodeSite"
            @nodeRightMenu="nodeRightMenu"
            @clickNode="clickNode"
          >
          </flow-node>
        </template>
        <!-- 给画布一个默认的宽度和高度 -->
        <div style="position: absolute; top: 2000px; left: 2000px">&nbsp;</div>
      </div>
      <!-- 右侧表单 -->
      <!-- <div style="width: 300px;border-left: 1px solid #dce3e8;background-color: #FBFBFB">
                <flow-node-form ref="nodeForm" @setLineLabel="setLineLabel" @repaintEverything="repaintEverything"></flow-node-form>
            </div> -->
    </div>
    <!-- 日志 -->
    <el-footer height="0">
      <div class="run-log" :class="expand ? 'expand' : ''">
        <el-tooltip :content="expand ? '收起' : '展开'" placement="top">
          <div class="expand-hot-zone text-center" @click="expand = !expand">
            <i class="fa fa-chevron-up"></i>
          </div>
        </el-tooltip>
        <div class="title">运行日志</div>
        <!-- <div class="details" v-html="execMsg"></div> -->
        <el-input
          class="details"
          type="textarea"
          :rows="7"
          v-model="execMsg"
          readonly
        ></el-input>
      </div>
    </el-footer>
    <!-- 流程数据详情 -->
    <flow-info v-if="flowInfoVisible" ref="flowInfo" :data="data"></flow-info>
    <flow-help v-if="flowHelpVisible" ref="flowHelp"></flow-help>

    <el-dialog
      title="任务配置"
      :visible.sync="dialogVisible"
      width="600px"
      :destroy-on-close="true"
    >
      <template>
        <job-config :job="data" @close="closeJobSetting" />
      </template>
    </el-dialog>
  </div>
</template>
    

<script>
import draggable from "vuedraggable";
// import { jsPlumb } from 'jsplumb'
// 使用修改后的jsplumb
import "./jsplumb";
import { easyFlowMixin } from "./mixins";
import flowNode from "./node";
import nodeMenu from "./node_menu";
import FlowInfo from "./info";
import FlowHelp from "./help";
import "./index.css";
import FlowNodeForm from "./node_form";
import JobConfig from "./jobConfig";
import lodash from "lodash";
import Job from "./Job.js";
import { addJob, updateJob, getJob } from "@/api/job/job";
import { startTask } from "@/api/task/task";

export default {
  data() {
    return {
      // jsPlumb 实例
      jsPlumb: null,
      // 控制画布销毁
      easyFlowVisible: true,
      // 控制流程数据显示与隐藏
      flowInfoVisible: false,
      // 是否加载完毕标志位
      loadEasyFlowFinish: false,
      flowHelpVisible: false,
      // 数据
      data: {},
      // 激活的元素、可能是节点、可能是连线
      activeElement: {
        // 可选值 node 、line
        type: undefined,
        // 节点ID
        nodeId: undefined,
        // 连线ID
        sourceId: undefined,
        targetId: undefined,
      },
      zoom: 0.5,
      Job: null,
      dialogVisible: false,
      execMsg: "",
      expand: "iiii",
    };
  },
  // 一些基础配置移动该文件中
  mixins: [easyFlowMixin],
  components: {
    draggable,
    flowNode,
    nodeMenu,
    FlowInfo,
    FlowNodeForm,
    FlowHelp,
    JobConfig,
  },
  directives: {
    flowDrag: {
      bind(el, binding, vnode, oldNode) {
        if (!binding) {
          return;
        }
        el.onmousedown = (e) => {
          if (e.button == 2) {
            // 右键不管
            return;
          }
          //  鼠标按下，计算当前原始距离可视区的高度
          let disX = e.clientX;
          let disY = e.clientY;
          el.style.cursor = "move";

          document.onmousemove = function (e) {
            // 移动时禁止默认事件
            e.preventDefault();
            const left = e.clientX - disX;
            disX = e.clientX;
            el.scrollLeft += -left;

            const top = e.clientY - disY;
            disY = e.clientY;
            el.scrollTop += -top;
          };

          document.onmouseup = function (e) {
            el.style.cursor = "auto";
            document.onmousemove = null;
            document.onmouseup = null;
          };
        };
      },
    },
  },
  mounted() {
    this.data = new Job();
    this.jsPlumb = jsPlumb.getInstance();
    this.easyFlowVisible = false;
    this.data.items = [];
    this.data.links = [];

    let id = this.$route.query.id;
    if (id) {
      getJob({ id: id }).then((res) => {
        this.$nextTick(() => {
          this.dataReload(res.data);
        });
      });
      return;
    } else {
      this.$nextTick(() => {
        this.dataReload(this.data);
      });
    }
  },
  created() {},
  methods: {
    // 返回唯一标识
    getUUID() {
      // return Math.random().toString(36).substr(3, 10);
      return Math.random().toString(36);
    },
    jsPlumbInit() {
      this.jsPlumb.ready(() => {
        // 导入默认配置
        this.jsPlumb.importDefaults(this.jsplumbSetting);
        // 会使整个jsPlumb立即重绘。
        this.jsPlumb.setSuspendDrawing(false, true);
        // 初始化节点
        this.loadEasyFlow();
        // 单点击了连接线, https://www.cnblogs.com/ysx215/p/7615677.html
        this.jsPlumb.bind("click", (conn, originalEvent) => {
          this.activeElement.type = "line";
          this.activeElement.sourceId = conn.sourceId;
          this.activeElement.targetId = conn.targetId;
          this.$refs.nodeForm.lineInit({
            from: conn.sourceId,
            to: conn.targetId,
            label: conn.getLabel(),
          });
        });
        // 连线
        this.jsPlumb.bind("connection", (evt) => {
          let from = evt.source.id;
          let to = evt.target.id;
          if (this.loadEasyFlowFinish) {
            this.data.links.push({ fromId: from, toId: to });
          }
        });

        // 删除连线回调
        this.jsPlumb.bind("connectionDetached", (evt) => {
          this.deleteLine(evt.sourceId, evt.targetId);
        });

        // 改变线的连接节点
        this.jsPlumb.bind("connectionMoved", (evt) => {
          this.changeLine(evt.originalSourceId, evt.originalTargetId);
        });

        // 连线右击
        this.jsPlumb.bind("contextmenu", (evt) => {
          console.log("contextmenu", evt);
        });

        // 连线
        this.jsPlumb.bind("beforeDrop", (evt) => {
          let from = evt.sourceId;
          let to = evt.targetId;
          if (from === to) {
            this.$message.error("节点不支持连接自己");
            return false;
          }
          if (this.hasLine(from, to)) {
            this.$message.error("该关系已存在,不允许重复创建");
            return false;
          }
          if (this.hashOppositeLine(from, to)) {
            this.$message.error("不支持两个节点之间连线回环");
            return false;
          }
          this.$message.success("连接成功");
          return true;
        });

        // beforeDetach
        this.jsPlumb.bind("beforeDetach", (evt) => {
          console.log("beforeDetach", evt);
        });
        this.jsPlumb.setContainer(this.$refs.efContainer);
      });
    },
    // 加载流程图
    loadEasyFlow() {
      // 初始化节点
      for (var i = 0; i < this.data.items.length; i++) {
        let node = this.data.items[i];
        // 设置源点，可以拖出线连接其他节点
        this.jsPlumb.makeSource(
          node.id,
          lodash.merge(this.jsplumbSourceOptions, {})
        );
        // // 设置目标点，其他源点拖出的线可以连接该节点
        this.jsPlumb.makeTarget(node.id, this.jsplumbTargetOptions);
        if (!node.viewOnly) {
          this.jsPlumb.draggable(node.id, {
            containment: "parent",
            stop: function (el) {},
          });
        }
      }
      // 初始化连线
      for (var i = 0; i < this.data.links.length; i++) {
        let line = this.data.links[i];
        var connParam = {
          source: line.fromId,
          target: line.toId,
          label: line.label ? line.label : "",
          connector: line.connector ? line.connector : "",
          anchors: line.anchors ? line.anchors : undefined,
          paintStyle: line.paintStyle ? line.paintStyle : undefined,
        };
        this.jsPlumb.connect(connParam, this.jsplumbConnectOptions);
      }
      this.$nextTick(function () {
        this.loadEasyFlowFinish = true;
      });
    },
    // 设置连线条件
    setLineLabel(from, to, label) {
      var conn = this.jsPlumb.getConnections({
        source: from,
        target: to,
      })[0];
      if (!label || label === "") {
        conn.removeClass("flowLabel");
        conn.addClass("emptyFlowLabel");
      } else {
        conn.addClass("flowLabel");
      }
      conn.setLabel({
        label: label,
      });
      this.data.links.forEach(function (line) {
        if (line.fromId == from && line.toId == to) {
          line.label = label;
        }
      });
    },
    // 删除激活的元素
    deleteElement() {
      if (this.activeElement.type === "node") {
        this.deleteNode(this.activeElement.nodeId);
      } else if (this.activeElement.type === "line") {
        this.$confirm("确定删除所点击的线吗?", "提示", {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        })
          .then(() => {
            var conn = this.jsPlumb.getConnections({
              source: this.activeElement.sourceId,
              target: this.activeElement.targetId,
            })[0];
            this.jsPlumb.deleteConnection(conn);
          })
          .catch(() => {});
      }
    },
    // 删除线
    deleteLine(from, to) {
      this.data.links = this.data.links.filter(function (line) {
        if (line.fromId == from && line.toId == to) {
          return false;
        }
        return true;
      });
    },
    // 改变连线
    changeLine(oldFrom, oldTo) {
      this.deleteLine(oldFrom, oldTo);
    },
    // 改变节点的位置
    changeNodeSite(data) {
      for (var i = 0; i < this.data.items.length; i++) {
        let node = this.data.items[i];
        if (node.id === data.nodeId) {
          node.x = data.x;
          node.y = data.y;
        }
      }
    },
    /**
     * 拖拽结束后添加新的节点
     * @param evt
     * @param nodeMenu 被添加的节点对象
     * @param mousePosition 鼠标拖拽结束的坐标
     */
    addNode(evt, nodeMenu, mousePosition) {
      var screenX = evt.originalEvent.clientX,
        screenY = evt.originalEvent.clientY;
      let efContainer = this.$refs.efContainer;
      var containerRect = efContainer.getBoundingClientRect();
      var left = screenX,
        top = screenY;
      // 计算是否拖入到容器中
      if (
        left < containerRect.x ||
        left > containerRect.width + containerRect.x ||
        top < containerRect.y ||
        containerRect.y > containerRect.y + containerRect.height
      ) {
        this.$message.error("请把节点拖入到画布中");
        return;
      }
      if (this.data.items.some((t) => t.name === nodeMenu.name)) {
        this.$message.error("插件[" + nodeMenu.name + "]已存在");
        return;
      }
      left = left - containerRect.x + efContainer.scrollLeft;
      top = top - containerRect.y + efContainer.scrollTop;
      // 居中
      left -= 85;
      top -= 16;
      var nodeId = this.getUUID();
      // 动态生成名字
      var origName = nodeMenu.name;
      var nodeName = origName;
      var index = 1;
      // while (index < 10000) {
      //   var repeat = false;
      //   for (var i = 0; i < this.data.items.length; i++) {
      //     let node = this.data.items[i];
      //     if (node.name === nodeName) {
      //       nodeName = origName + index;
      //       repeat = true;
      //     }
      //   }
      //   if (repeat) {
      //     index++;
      //     continue;
      //   }
      //   break;
      // }
      // var node = {
      //   id: nodeId,
      //   name: nodeName,
      //   type: nodeMenu.type,
      //   left: left + "px",
      //   top: top + "px",
      //   ico: nodeMenu.ico,
      //   state: "success",
      // };
      const Step = new this[nodeName]({
        id: nodeId,
        name: nodeName,
        type: nodeMenu.type,
        x: left + "px",
        y: top + "px",
        ico: nodeMenu.ico,
        state: "success",
        attrs: {},
      });
      /**
       * 这里可以进行业务判断、是否能够添加该节点
       */
      this.data.items.push(Step);

      this.$nextTick(function () {
        this.jsPlumb.makeSource(nodeId, this.jsplumbSourceOptions);
        this.jsPlumb.makeTarget(nodeId, this.jsplumbTargetOptions);
        this.jsPlumb.draggable(nodeId, {
          containment: "parent",
          stop: function (el) {
            // 拖拽节点结束后的对调
            console.log("拖拽结束: ", el);
          },
        });
      });
    },
    /**
     * 删除节点
     * @param nodeId 被删除节点的ID
     */
    deleteNode(nodeId) {
      this.$confirm("确定要删除节点" + nodeId + "?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
        closeOnClickModal: false,
      })
        .then(() => {
          /**
           * 这里需要进行业务判断，是否可以删除
           */
          this.data.items = this.data.items.filter(function (node) {
            if (node.id === nodeId) {
              // 伪删除，将节点隐藏，否则会导致位置错位
              // node.show = false
              return false;
            }
            return true;
          });
          this.$nextTick(function () {
            this.jsPlumb.removeAllEndpoints(nodeId);
          });
        })
        .catch(() => {});
      return true;
    },
    clickNode(nodeId) {
      this.activeElement.type = "node";
      this.activeElement.nodeId = nodeId;
      this.$refs.nodeForm.nodeInit(this.data, nodeId);
    },
    // 是否具有该线
    hasLine(from, to) {
      for (var i = 0; i < this.data.links.length; i++) {
        var line = this.data.links[i];
        if (line.fromId === from && line.toId === to) {
          return true;
        }
      }
      return false;
    },
    // 是否含有相反的线
    hashOppositeLine(from, to) {
      return this.hasLine(to, from);
    },
    nodeRightMenu(nodeId, evt) {
      this.menu.show = true;
      this.menu.curNodeId = nodeId;
      this.menu.x = evt.x + "px";
      this.menu.y = evt.y + "px";
    },
    repaintEverything() {
      this.jsPlumb.repaint();
    },
    // 流程数据信息
    dataInfo() {
      this.flowInfoVisible = true;
      this.$nextTick(function () {
        this.$refs.flowInfo.init();
      });
    },
    // 加载流程图
    dataReload(data) {
      this.easyFlowVisible = false;

      this.$nextTick(() => {
        this.data = new Job(lodash.cloneDeep(data));
        this.data.items = [];
        this.data.links = [];
        this.easyFlowVisible = true;
        if (data) {
          if (data.items) {
            data.items.forEach((item) => {
              this.data.items.push(new this[item.name](item));
            });
          }
          if (data.links) {
            this.data.links = data.links;
          }
        }

        this.$nextTick(() => {
          this.jsPlumb = jsPlumb.getInstance();
          this.$nextTick(() => {
            this.jsPlumbInit();
          });
        });
      });
    },

    saveTask: lodash.debounce(function () {
      if (this.data.id) {
        updateJob(this.data).then((res) => {
          this.$message.success("更新成功");
        });
        return;
      }
      addJob(this.data).then((res) => {
        this.$message.success("保存成功");
      });
    }, 1000),

    startTaskHandler() {
      if (!this.data.id) {
        this.$message.warning("还未保存，请先保存后再执行");
        return;
      }
      startTask({ jobId: this.data.id }).then((res) => {
        this.$message.success("任务开始执行");
      });
    },
    jobSettingHandler() {
      this.dialogVisible = true;
    },
    closeJobSetting() {
      this.dialogVisible = false;
    },

    zoomAdd() {
      if (this.zoom >= 1) {
        return;
      }
      this.zoom = this.zoom + 0.1;
      this.$refs.efContainer.style.transform = `scale(${this.zoom})`;
      this.jsPlumb.setZoom(this.zoom);
    },
    zoomSub() {
      if (this.zoom <= 0) {
        return;
      }
      this.zoom = this.zoom - 0.1;
      this.$refs.efContainer.style.transform = `scale(${this.zoom})`;
      this.jsPlumb.setZoom(this.zoom);
    },
    // 下载数据
    downloadData() {
      this.$confirm("确定要下载该流程数据吗？", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
        closeOnClickModal: false,
      })
        .then(() => {
          var datastr =
            "data:text/json;charset=utf-8," +
            encodeURIComponent(JSON.stringify(this.data, null, "\t"));
          var downloadAnchorNode = document.createElement("a");
          downloadAnchorNode.setAttribute("href", datastr);
          downloadAnchorNode.setAttribute("download", "data.json");
          downloadAnchorNode.click();
          downloadAnchorNode.remove();
          this.$message.success("正在下载中,请稍后...");
        })
        .catch(() => {});
    },
    openHelp() {
      this.flowHelpVisible = true;
      this.$nextTick(function () {
        this.$refs.flowHelp.init();
      });
    },
  },
};
</script>
<style lang="scss" scoped>
/deep/ .el-dialog__body {
  padding: 0px 0px 30px;
}
/deep/.el-tabs__header {
  padding: 0px 20px;
}
</style>
